We call those legacy product now. You can use drop in led bulbs and I think its the way to go but it comes down to cost. Led wafers are very cheap and quick to install. Basiv Led reccessed cans are ic rated without sockets. I see more integrated led in my professional life everyday.

Is it an integrated led fixture? They don't have bulbs they have light engines and the whole thing needs to be replaced. When led first came out they said they would last forever. Now we know it's about 50,000 hours hopefully with a L70 dim.

However its usually not the led that fails its the electronics.